Tool-holder.



H0- 8l1,786. PATENTED FEB. 6, 1906. P. P. MILLER. TOOL HOLDER. nrmenmxHum 1.15, 1004.

reception of but one cutting-too UNITED STA'IBIS PATENT OFFICE.

TOOL-HOLDER.

Specification of Letters Patent.

Patented Feb. 6, 1966.

Application filed March 15, 1904. Serial No. 1933'.

To all whom it TIL-(11y concern.-

Be it known that I, FRANKLiN I. MILLER, a citizen of the United States,residing at Bloomfield, in the county of Essex and State of New Jersey,have invented certain new and useful Improvements in Tool-Holders, ofwhich the following is a specification.

My invention relates to tool-holders for lathes and other machines wherea cuttingtool has to be supported; and it consists of a block contractedtoward one or both ends, having one or more side sockets with means forholding a tool and securing it in desired positions therein and adaptedto also support the carrier for a boring-tool, as fully set forthhereinafter and as illustrated in the accompanying drawings, in which-.V Figure 1 is a side view of a holder for a sinle tool; Fig. 2, an edgeview of the same; ig. 3, a plan view; Fig. 4., a perspective view ofadoubleholder or one adapted for su porting two tools. Fi 5 is a sideview of a fielder shown in Fig. 4; I" 6, a plan showing the holder ofFigs. 4 and 5 in its relation to the work in different positions; Fig.7", a side view of a carrier for a boring-tool adapted for use with theholder; Fig. 8, the same in part section ap lied to a holder andcarrying the boring-too Fig. 9, a plan of a carrier and its horingtool.

The tool-holder consists, essentially, of a heavy block A, which may beadapted for the support of one or more tools B and which has anelongated recess 1 for the reception of the usual post 0, which may beapplied to the bed or movable carrier D of a lathe. The block is beveledor contracted at one or both ends-that is, it is ta ered in a planetransverse to the axis of t 1e pcst-and at one or more sides of thisblock are sockets 3, each of which is inclined upward and outward topermit the tool to be presented at an angle with its edge against thematerial, while the holder occupies a low position and is therefore moresolid and rigid. Each socket has a rounded lower face 4, adapted to therounded lower face of a shoe 5, which may therefore be set at differentangles, according to the an is at which the tool B is to be set, the saitool resting upon the u per face of the shoe within the socket and singsecured after adj ustment by means of any suitable securing device as,for instance, a set-screw 6.

In the construction shown in Figs. 1, 2, 3 the holder is single -thatis, adapted for the In Figs.

4, 5, and 6 is shown a construction adapted for receiving two tools. Ineither case it will be seen that by providing a heavy block with asocket at one side it is possible to make use of a tool consisting of aplain block of steel capable of being shaped without forging and whichwill he supported almost to its cutting end within the socket of theblock so as to be rigid and unyielding, avoiding the ob jcctionsincident to the spring of the tool or the holder. I can therefore use avery much smaller amount of metal, as the tool as it wears may be groundand reground and fed forward until but a small portion of the stockremains. The common forged tool is very wasteful of both labor andsteel, as the forging shapes only a small part of the stock, and thlsalone is used for cutting purposes.

A heavy block of metal contracted toward one or both ends, as described,and having a recess, which may be round or elongated, adapted to receivethe post of a lathe, not only affords a firm support for the tool, butowing to its ointed end permits the tool to he supporte at points closeto the head or shoulder of the lathe and to be introduced into parts ofthe work where heretofore it has been necessary to employ toolssupported so far from their ends that the spring of the tool has roducedimperfect work, resulting in the reaking of the tools and limited speedof o oration. By the use of a pointed block of t 10 character describedwith the socket at one side the tool can be supported almost to itscutting edge by a support which is practically rigid and unyielding, andwhen the block has an elongated recess the holder may be shifted uponthe post to carry the tool back and forth and present it to the work atany desired angle.

When the holder is double, as shown in Figs. 4 and 6, it may be swungupon the post to different osit-ions, as indicated in Fig. 6, bringingsit or tool into operation upon the work. In this case the two socketedsides meet at an angle, so that either tool can be brought more nearlparallel with the article bein cut or with the axis of the lathe than wed be ossible if the tools were in line.

While t e holder is adapted especially for use with tools made of simplebars ground to shape, it may of course be employed in connection withvarious forms of tools.

I For use in connection with boring-tools I employ a socketed carrier E,(shown in Figs. 7, 8, and 9,) the said carrier having a recess 8 toreceive the stem 9 of the boring-tool F and with set-screws or othersecuring devices 10, and at the side of this carrier is a wing 12, whichis preferably inclined, as shown, and which may be inserted in thesocket of the holder A and rest upon the shoe and be adjusted todifferent angles and secured in the same manner as the tool B. It willbe obvious, of course, that this carrier E may be of different shapeswith sockets of different shapes, according to the character of theboring-tool to be used.

Without limiting myself to the precise construction shown, I claim 1. Atool-holder consisting of a block recessed to receive a post to secureit to the bed or carrier of a lathe, tapered in a plane transverse tothe axis of the post, and provided with a side recess and means tosecure a tool in an inclined position therein, substantially as setforth.

2. A tool-holder consisting of a block recessed to receive a posttapered at each end in a plane transverse to the axis of the post,forming converging side faces, with an inclined recess in each face, andmeans for securing atool therein, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRANKLIN P. MILLER.

Witnesses:

(lnAs. J. MoDERMo'rT, CnAs. L. THATOIIER.

